JP5325485B2 - Laser surgical device - Google Patents

Description

  The present invention relates to a laser surgical apparatus that treats an eye to be examined by irradiating a laser beam.

  Conventionally, a laser treatment apparatus that illuminates a treatment site with an illumination optical system and irradiates the treatment site with laser light is known (see, for example, Patent Document 1).

  As shown in FIG. 3, the laser treatment apparatus 1 of Patent Document 1 includes an illumination light source 2cg, and an illumination optical system 2c that illuminates the inside of the eye 1E with illumination light 2cL when treating, and a treatment laser beam. Is applied to the treatment site of the eye 1E to be examined, and an observation optical system 3a to observe the inside of the eye 1E to be examined.

  The illumination optical system 2c is provided in front of the objective lens 3T of the observation optical system 3a (left side in FIG. 3), and includes reflecting split mirrors 2ca and 2cb.

The split mirrors 2ca and 2cb are arranged at different positions so as to sandwich the optical axis 2bs at positions shifted from the optical axis 2bs so as not to interfere with the therapeutic laser beam, and reflect the illumination light 2cL emitted from the illumination light source 2cg. Then, the inside of the eye 1E to be examined is illuminated.
Further, a conventional laser treatment apparatus 5 as shown in FIG. 4 is known. The laser treatment apparatus 5 irradiates the treatment site of the eye E with the illumination optical system 5a that illuminates the inside of the eye E with the illumination light 5aL, the treatment laser light 5daL, and the aiming laser light 5dbL during treatment. An irradiation optical system 5b and an observation optical system 5c for observing the inside of the eye E to be examined are provided.

  The illumination optical system 5a is provided in front of the objective lens 5T of the observation optical system 5c (left in FIG. 4), and the illumination light 5aL emitted from the illumination light source 5aa illuminates the eye E.

The laser beams 5daL and 5dbL oscillated from the laser light sources 5da and 5db are reflected by the dichroic mirror 5e disposed between the objective lens 5T and the eye E through the optical fiber 5f and the irradiation optical system 5b. Irradiate the inside of the optometry E.
JP 2004-57742 A

  However, in such a laser treatment apparatus of Patent Document 1, since the illumination optical system 2c is provided in front of the objective lens 3T of the observation optical system 3a, the operator 1J observes the inside of the eye 1E to be examined, etc. In this case, there is a problem that the illumination optical system 2c interferes with the contact lens 1C worn by the subject.

Further, the split mirrors 2ca and 2cb of the illumination optical system 2c are arranged at positions shifted from the optical axis 2bs of the therapeutic laser beam and illuminate the inside of the eye 1E from here, so that the illumination light is applied to the pupil of the eye 1E to be examined 2cL is incident obliquely, and there is a problem that the illumination light 2cL is difficult to enter the pupil.
Further, in the conventional laser treatment apparatus 5 shown in FIG. 4, since the irradiation optical system 5b and the illumination optical system 5a are provided in front of the objective lens 5T, when performing laser treatment or observation of the fundus Er of the eye E to be examined. There is a problem that the irradiation optical system 5b interferes with the contact lens C worn by the subject.
The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a laser surgical apparatus in which the illumination optical system and the irradiation optical system do not interfere with the contact lens and the illumination light can easily enter the pupil. And

In order to achieve the above object, according to the first aspect of the present invention , a laser beam oscillation means for oscillating a laser beam used for the treatment of the eye to be examined, and a treatment for the eye to be examined which are provided coaxially with the laser beam oscillation means. Aiming light output means for outputting aiming light for aiming at a site, light guiding means for guiding the laser light and the aiming light, the laser light guided by the light guiding means, and the aiming Irradiation optical system for irradiating the treatment site of the eye to be examined with light through the objective lens, an illumination optical system for illuminating the treatment site of the eye to be examined with illumination light, and observing the treatment site through the objective lens And an observation optical system for
The laser light emitted from the light guide means and a first reflective optical member that transmits the laser light and the aiming light and reflects the illumination light so as to be coaxial with the optical axis of the illumination optical system; The laser light and the aiming light, which are disposed on the optical path with the aiming light and transmitted through the first reflecting optical member, are reflected toward the objective lens so as to be coaxial with the optical axis of the objective lens, and The second reflecting optical member that reflects the illumination light reflected by the first reflecting optical member so as to be coaxial with the optical axis of the objective lens is disposed in the optical path between the objective lens and the observation optical system. It is characterized by.
According to the second aspect of the present invention, a laser beam oscillating unit that oscillates a laser beam used for treatment of the eye to be examined, and a laser beam oscillating unit that is provided coaxially with the laser beam oscillating unit to aim at the treatment site of the eye to be examined Aiming light output means for outputting aiming light, a light guiding means for guiding the laser light and the aiming light, and the laser light guided by the light guiding means and the aiming light through an objective lens An irradiation optical system for irradiating the treatment site of the eye to be examined, an illumination optical system for illuminating the treatment site of the eye to be examined with illumination light, and an observation optical system for observing the treatment site via the objective lens; With
The laser light emitted from the light guide means and a first reflective optical member that reflects the laser light and the aiming light so as to be coaxial with the optical axis of the illumination optical system and transmits the illumination light; It is disposed on the optical path with the aiming light and reflects the laser light and the aiming light reflected by the first reflecting optical member toward the objective lens so as to be coaxial with the optical axis of the objective lens. A second reflective optical member that reflects the illumination light transmitted through the first reflective optical member so as to be coaxial with the optical axis of the objective lens is disposed between the objective lens and the observation optical system. And

  According to the laser surgical apparatus of the present invention, the illumination optical system and the irradiation optical system do not interfere with the contact lens, and the illumination light can be more easily incident into the pupil.

  Hereinafter, examples of the best mode of the laser surgical apparatus according to the present invention will be described with reference to the drawings.

[Example 1]
First, the configuration of the laser surgical apparatus according to the first embodiment of the present invention will be described.

  FIG. 1 is a diagram illustrating configurations of various optical systems included in the laser surgical apparatus according to the first embodiment.

  As shown in FIG. 1, the laser surgical apparatus 100 includes a laser output unit 200, a slit lamp 400, and the like.

  The laser output unit 200 is used to align the treatment laser light with the treatment laser light source (laser light oscillation means) 11 that oscillates the laser light used for the treatment of the eye E and the treatment site of the eye E. An aiming laser light source (aiming light output means) 12 for outputting aiming laser light (aiming light).

  The slit lamp 400 includes an illumination optical system 20 that illuminates a treatment site of the eye E with illumination light, an observation optical system 30 for observing the treatment site of the eye E, a treatment laser beam, and an aiming laser. An optical fiber (light guiding means) 15 for guiding light and an objective lens (imaging lens) 52 are provided, and therapeutic laser light and aiming laser light incident on the optical fiber 15 are received through the objective lens 52. And an irradiation optical system 40 that irradiates the treatment site of the optometry E.

  The treatment laser light source 11 oscillates a laser beam having a wavelength of 532 nm, and is used for treatment to photocoagulate a treatment site on the retina of the eye E to be treated.

  The aiming laser light source 12 oscillates a laser beam having a wavelength of 635 nm, and is used to align the irradiation position of the treatment laser beam with the treatment site.

  The treatment laser light source 11 and the aiming laser light source 12 are not limited to the wavelengths, and other types of light sources and wavelengths may be used.

  The therapeutic laser light and the aiming laser light are emitted from the therapeutic laser light source 11 and the aiming laser light source 12, and their optical paths L1 and L2 are combined by the dichroic mirror 13 and are coaxial.

  The therapeutic laser light and the aiming laser light pass through the dichroic mirror 13, are condensed on the incident end face 15 a of the optical fiber 15 by the condenser lens 14, and enter the optical fiber 15.

  The therapeutic laser beam and the aiming laser beam incident on the optical fiber 15 are guided by the optical fiber 15 and emitted from the emission end face 15b to the irradiation optical system 40 of the laser surgical apparatus.

  The irradiation optical system 40 has a lens 16a that converts therapeutic laser light and aiming laser light from the output end face 15b into parallel light beams, and therapeutic laser light and aiming laser light that has been converted into parallel light beams by the lens 16a. A condensing lens 16b, lenses 16c and 16d for changing the spot diameter of the laser beam at the in-focus position in the eye E, and a therapeutic laser beam and an aiming laser beam passing through the lenses 16c and 16d Are made into a parallel light beam, and a reflection mirror 51 and the like for reflecting laser light and illumination light toward the objective lens 52.

  The lenses 16c and 16d are moved in the optical axis direction by a cam mechanism (not shown) to change the focus position of the treatment laser beam and the aiming laser beam in the eye E to be examined.

Reflecting mirror 51 is for totally reflecting the irradiated laser beam and the sighting laser beam and the illumination light. The central portion of the reflection mirror 51 is a total reflection portion, and both side portions thereof are part of a pair of observation optical paths. This portion transmits only the illumination light and reflects the treatment laser beam and the aiming laser beam.

  The illumination optical system 20 includes an illumination light source 24 such as a halogen lamp that emits illumination light for illuminating the fundus Er of the eye E, a condenser lens 23 that collects light from the illumination light source 24, and a variable for illumination light. A variable slit plate 22 for aperture and illumination light, a light projecting lens 46 that collimates the luminous flux of the illumination light, and a filter 50 that transmits the treatment laser light and the aiming laser light and reflects the illumination light of the illumination optical system 20. (Reflection optical member).

The visible light beam emitted from the illumination light source 24 passes through the condenser lens 23 of the illumination optical system 20, and then the height is determined by a variable aperture (not shown) and the width thereof is determined by a variable slit plate 22, so that it becomes a variable slit light beam. It is formed.
The illumination light that has passed through the variable slit plate 22 is projected toward the filter 50 via the light projection lens 46 of the lens group.

  The filter 50 is provided on the optical axis S of the irradiation optical system 40 between the objective lens 52 and the lens 16e of the irradiation optical system 40, and applies a treatment laser beam having a wavelength of 532 nm and an aiming laser beam having a wavelength of 635 nm. In addition to transmitting, light of other wavelengths, here, illumination light from the projection lens 46 is reflected and introduced coaxially with the optical axis S of the irradiation optical system 40.

  The objective lens 52 focuses the light beam of therapeutic laser light, aiming laser light, and illumination light that passes therethrough into the eye E, and aiming laser light or illumination light reflected by the fundus Er of the eye E. The reflected light beam is guided to the observation optical system 30.

  The observation optical system 30 is provided with a pair of left and right eyepiece optical systems 31 and a filter 32 that cuts off light having a wavelength of 532 nm so that a surgeon performing treatment can view the observation image of the eye E to be examined with both eyes. And an optical system 33 and the like. The observation optical system 30 may be equipped with an observation camera (not shown) having an image sensor for taking an observation image.

  Next, the operation of the laser surgical apparatus 100 according to the first embodiment of the present invention will be described.

  When treating the eye E, the subject is a contact lens C for observing the fundus Er of the eye E (for example, Volk which has a refractive power of 40-60D and neutralizes the refractive index of the cornea) Wear a contact lens (made of) to the cornea.

  Then, the light source 24 is turned on, and the illumination light beam emitted from the light source 24 is condensed by the condenser lens 23, and the condensed illumination light beam is converted into a parallel light beam by the light projecting lens 46 and enters the filter 50.

  Here, the illumination light flux incident on the filter 50 is totally reflected by light having a wavelength other than the wavelengths of the treatment laser and the irradiation laser, and is introduced into the optical axis S of the irradiation optical system 40, so that the reflection mirror 51, the objective lens 52, The fundus Er of the eye E is illuminated through the contact lens C.

  By the way, since this illumination light beam is introduced coaxially with the optical axis S of the irradiation optical system 40, it easily enters the pupil of the eye E, and the periphery of the treatment site can be illuminated brightly. It becomes easy to observe the site and its surroundings.

  When the treatment site is specified by observing the fundus Er, the aiming laser beam is oscillated to irradiate the treatment site with the treatment laser beam. The aiming laser light is guided to the fundus Er of the eye E through the optical fiber 15 and the irradiation optical system 40.

  Then, the main body is adjusted vertically and horizontally so that the aiming laser beam coincides with the treatment site, and the treatment site is aimed. After the aim is determined, the treatment laser beam is oscillated, and the treatment laser beam is guided to the treatment site of the eye E through the optical fiber 15 and the irradiation optical system 40 in the same manner as the aiming laser beam, and the treatment site is irradiated. The treatment is done.

  The therapeutic laser light passes through the filter 50 in the irradiation optical system 40 and is reflected by the reflection mirror 51 to irradiate the treatment site of the eye E. The filter 50 transmits a wavelength of 532 nm, and the reflection mirror Since 51 totally reflects light having a wavelength of 532 nm, the treatment site can be irradiated with no loss.

In the laser surgical apparatus 100 according to the first embodiment, the illumination optical system 20 and the irradiation optical system 40 are disposed behind the objective lens 52. Therefore, when the fundus examination is performed while illuminating the fundus Er with illumination light as described above, The illumination optical system 20 and the irradiation optical system 40 do not interfere with the contact lens C when aiming at the treatment site with the aiming laser light and irradiating the fundus Er with the treatment laser light.
Moreover, since the irradiation optical system 40, the illumination optical system 20, and the observation optical system 30 share one objective lens 52, the number of parts is smaller than that of a conventional laser surgical apparatus (Patent Document 1).

Unlike the configuration of the first embodiment, even if the optical axes of the irradiation laser light and the aiming laser light are different from each other in the laser surgical apparatus, the treatment laser light and the aiming as in the filter 50 of the present embodiment. Providing a filter on the optical axis of any one of the above laser beams, which transmits both of the laser beams for use, or transmits either the treatment laser beam or the aiming laser beam, and reflects illumination light of other wavelengths, If the optical axis of the illumination light and the optical axis of the laser light are coaxial, the same operation and effect as in the present embodiment can be obtained, and the configuration is not limited to that of the first embodiment.
[Example 2]
A laser surgical apparatus according to a second embodiment that embodies the present invention will be described below with reference to FIG. In addition, the same structure as Example 1 attaches | subjects the same code | symbol as Example 1, and abbreviate | omits the detailed description.
As shown in FIG. 2, the laser surgical apparatus 101 includes a laser output unit 200, a slit lamp 410, and the like.
The slit lamp 410 includes an illumination optical system 120, an observation optical system 130, and an irradiation optical system 140.
The irradiation optical system 140 includes lenses 16a to 16e, a filter 150 (first reflective optical member) that reflects treatment laser light and aiming laser light and transmits illumination light, and laser light reflected by the filter 150. A reflection mirror 51 (second reflection optical member) that reflects toward the objective lens 52 is included.
The filter 150 and the reflection mirror 51 are arranged on the optical axis B behind the objective lens 52.
The illumination optical system 120 is provided behind the filter 150 coaxially with the optical axis B between the filter 150 and the reflection mirror 51, and includes an illumination light source 24, a condenser lens 23, a variable aperture and a variable slit plate 22, A projection lens 46 and the like.

Next, the operation of the laser surgical apparatus 101 according to the second embodiment of the present invention will be described.
When the light source 24 of the illumination optical system 120 is turned on to illuminate and observe the inside of the eye E, the illumination light beam emitted from the light source 24 is collected by the condenser lens 23 and converted into a parallel light beam by the projection lens 46. The light enters the filter 150.

The illumination light beam incident on the filter 150 passes through the filter 150 and is reflected toward the objective lens 52 by the reflection mirror 51 of the irradiation optical system 140, and illuminates the treatment site of the eye E through the objective lens 52.
By the way, since the illumination optical system 120 is provided coaxially with the optical axis B, it easily enters the pupil of the eye E and can illuminate the periphery of the treatment site brightly. It becomes easy to observe.
When the treatment site is specified by observing the fundus Er, the aiming laser beam is oscillated to irradiate the treatment site with the treatment laser beam. The aiming laser light is guided to the irradiation optical system 140 through the optical fiber 15 and is reflected by the filter 150 and the reflection mirror 51 of the irradiation optical system 140 to irradiate the treatment site of the eye E to be examined.

  Then, the main body is adjusted vertically and horizontally so that the aiming laser beam coincides with the treatment site, and the treatment site is aimed. After the aim is determined, the treatment laser beam is oscillated, and the treatment laser beam is guided to the treatment site of the eye E through the optical fiber 15 and the irradiation optical system 140 in the same manner as the aiming laser beam, and the treatment site is irradiated. The treatment is done.

The therapeutic laser light is reflected by the filter 150 and the reflection mirror 51 in the irradiation optical system 140 and irradiates the treatment site of the eye E. The filter 150 and the reflection mirror 51 totally reflect the wavelength of 532 nm. Therefore, there is no loss and the treatment site can be irradiated.
In the laser surgical apparatus 101 according to the second embodiment, the illumination optical system 120 and the irradiation optical system 140 are provided behind the objective lens 52. Therefore, when performing fundus examination while illuminating the fundus Er with illumination light as described above, The illumination optical system 120 and the irradiation optical system 140 do not interfere with the contact lens C when aiming at the treatment site with the aiming laser light and irradiating the fundus Er with the treatment laser light.
Moreover, since the irradiation optical system 140, the illumination optical system 120, and the observation optical system 30 share one objective lens 52, the number of components is smaller than that of the conventional laser surgical apparatus (Patent Document 1).

  As described above, the laser surgical apparatuses 100 and 101 of the present invention have been described based on the first and second embodiments. However, the specific configuration is not limited to these embodiments, and the claims are included in the claims. Design changes and additions are allowed without departing from the gist of the invention.

It is a figure which shows the structure of the various optical systems with which the laser surgery apparatus of Example 1 is provided. It is a figure which shows the structure of the various optical systems with which the laser surgery apparatus of Example 2 is provided. It is a figure which shows the structure of the conventional laser treatment apparatus. It is a figure which shows the structure of the conventional laser treatment apparatus.

Explanation of symbols

11 Treatment laser light source (laser light oscillation means)
12 Aiming laser light source (aiming light output means)
20, 120 Illumination optical system 24 Illumination light source 30 Observation optical system 40, 140 Irradiation optical system 50, 150 Filter (reflection optical member, first reflection optical member)
52 Objective lens (imaging lens)
100, 101 Laser surgical device E Eye to be examined Er Fundus K, S Optical axis

Claims (2)

Laser light oscillating means for oscillating laser light used for treatment of the eye to be examined, and sighting light output means for outputting sighting light provided coaxially with the laser light oscillating means for aiming at the treatment site of the eye to be examined And a light guide means for guiding the laser light and the aiming light; and the laser light and the aiming light guided by the light guide means are irradiated to the treatment site of the eye to be examined through an objective lens. An illumination optical system, an illumination optical system that illuminates a treatment site of the eye to be examined with illumination light, and an observation optical system for observing the treatment site via the objective lens, and the light of the illumination optical system A first reflective optical member that transmits the laser light and the aiming light and reflects the illumination light so as to be coaxial with an axis is on an optical path between the laser light emitted from the light guide means and the aiming light. arranged, the first reflective optical The laser light and the aiming light transmitted through the material are reflected toward the objective lens so as to be coaxial with the optical axis of the objective lens, and the illumination light reflected by the first reflective optical member is reflected on the objective lens A laser surgical apparatus , wherein a second reflecting optical member for reflecting the light beam so as to be coaxial with the optical axis is disposed in an optical path between the objective lens and the observation optical system . Laser light oscillating means for oscillating laser light used for treatment of the eye to be examined, and sighting light output means for outputting sighting light provided coaxially with the laser light oscillating means for aiming at the treatment site of the eye to be examined And a light guide means for guiding the laser light and the aiming light; and the laser light and the aiming light guided by the light guide means are irradiated to the treatment site of the eye to be examined through an objective lens. An illumination optical system, an illumination optical system that illuminates the treatment site of the eye to be examined with illumination light, and an observation optical system for observing the treatment site via the objective lens,
The laser light emitted from the light guide means and a first reflective optical member that reflects the laser light and the aiming light so as to be coaxial with the optical axis of the illumination optical system and transmits the illumination light; It is disposed on the optical path with the aiming light and reflects the laser light and the aiming light reflected by the first reflecting optical member toward the objective lens so as to be coaxial with the optical axis of the objective lens. A second reflective optical member that reflects the illumination light transmitted through the first reflective optical member so as to be coaxial with the optical axis of the objective lens is disposed between the objective lens and the observation optical system. Laser surgery device.

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