JPH01205895A - Laser beam projecting device - Google Patents

Abstract

PURPOSE:To miniaturize a laser device and to improve the operability by condensing a laser beam by providing visual light transmitting part and CO2 laser beam transmitting part on a monocondensing optical system. CONSTITUTION:The observation light L1 and lighting light L2 passing part and CO2 laser beam L3 passing part are provided on a single condensing lens 9 and a microscope main body is composed so as to focus on one point of the part 10 to be projected even if the retraction factor due to the difference in the respective wavelength differs. Namely, the CO2 laser beam transmitting material is provided on one part of the condensing lens 9 to enable to transmit visual light and CO2 laser light at the same time. Consequently, the miniaturiza tion of the laser device and improvement in its operation are enabled without the need for providing the respective exclusive condensing optical system.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention includes an observation optical system and a CO□ laser optical system, and while observing the irradiated area, a CO2 laser is directed to the irradiated area using a condensing optical system. The present invention relates to a laser irradiation device configured to condense light.

[Conventional technology]

In recent years, laser light has been used in treatment devices such as laser scalpels and micromachining. Japanese Unexamined Patent Publication 1986-15
Publication No. 6031 shows one example of this, and is a surgical microscope used as a treatment device, in which the microscope body is equipped with an observation optical system and an illumination optical system, and the illumination optical path and observation optical path pass through a common objective lens. This allows observation while illuminating the area to be observed. Further, a laser adapter is detachably provided in the objective section of this surgical microscope, so that the observed section can be irradiated with a laser while being observed. In other words, when observing the area to be observed while illuminating it and performing treatment by irradiating the area with laser light, a laser adapter is attached to the objective section of the microscope main body, and the laser optical system provided on the laser adapter emits a laser beam. It is designed to focus and irradiate light.

[Problem to be solved by the invention]

However, as described above, a structure in which a laser adapter can be attached and detached from the objective part of a surgical microscope has the drawbacks that attaching and detaching the laser adapter is troublesome and the surgical microscope becomes larger. Furthermore, when a laser adapter is attached to the objective part of the microscope body, the distance between the lower part of the microscope body and the part to be observed is shortened, and the laser adapter becomes an obstacle during surgery, resulting in poor operability.

The present invention has been made in view of the above circumstances, and its purpose is to provide a laser irradiation device that can be made smaller and have improved operability.

[Means and effects for solving the problem] In order to achieve the above-mentioned object, the present invention includes an observation optical system and a CO2 laser optical system, and is configured to be able to focus CO2 laser light on the irradiated area. In some cases, a single condensing optical system
The reason is that a visual light transmitting section and a CO2 laser light transmitting section are provided.

In other words, CO is included in a part of the condensing lens as a condensing optical system.
A feature is that two laser beam transmitting materials are provided so that visible light and Co2 laser beam can be transmitted simultaneously.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 3 show a surgical microscope equipped with a CO2 laser irradiation device, where 1 is a microscope body, 2 is an eyepiece, and 3 is an objective. Inside the microscope body 1, there is an observation optical system 4.4 consisting of several stages of lenses and prisms.
An illumination optical system 7 consisting of a light guide fiber 5 and a prism 6 is provided. Furthermore, the microscope main body 1 has a fiber for optically transmitting the CO2 laser beam, that is, the material is KRS-5 (a mixed crystal of thallium bromide and thallium iodide;
Tl! A CO2 laser guide 8 as a CO2 laser optical system consisting of B r-T)I) is provided. The observation optical path 4 as 4 as illumination optical path 7a and the laser optical path 8a are arranged in parallel and face the objective section 3. This objective section 3 is provided with a condensing lens 9 as a condensing optical system. The observation light 7, the illumination light L2 and the laser light L3 are focused on one point on the irradiated area 10 by a condenser lens 9.
Laser light L3 is applied as necessary while observing the irradiated part 10.
It is configured such that laser treatment can be performed by irradiating the irradiated part 10 with the laser beam.

Here, to explain the condensing lens 9, as shown in FIGS. 4 and 5, a part of the lens body 11 serving as a visible light transmitting part, that is, a part facing the laser light path 8a, receives CO2 laser light. A transmitting portion 12 is provided integrally. The lens body 11 is made of a material that transmits visible light, such as BK.
-7 or the like, and the CO2 laser beam transmitting portion 12 is made of a CO2 laser beam transmitting material, such as KRS-5 (mixed crystal of thallium bromide and thallium iodide; 'rj'Br-T)I).
, AgBr, chalcogenide, or fluoride glass. In other words, the condenser lens 9 of 111- is provided with a part through which the observation light L1 and the illumination light L2 are transmitted, and a part through which the CO□ laser beam L3 is transmitted, so that even if the refractive index differs due to the difference in wavelength, the condenser lens 9, observation light L1, illumination light L2 and CO2 laser light L3
is adapted to be focused on one point on the irradiated portion 10. Note that the focus of the Co2 laser beam is: J! The CO2 laser guide 8 may be moved in the optical axis direction as a means for performing Jfii, and another lens may be provided between the output end of the CO2 laser guide 8 and the condensing lens 9.

Next, the method of manufacturing the condensing lens 9 will be explained based on FIG. 6. First, as shown in FIG.
A convex lens body 11 is formed from a visible light transmitting material such as K-7, and a through hole 11a is bored in a part of the lens body 11 as shown in (B). Next, as shown in (C), the infrared transmitting material 1 described above is inserted into the through hole 11a.
1b and mold the CO2 laser beam transmitting section 12.

In the above embodiment, a surgical microscope has been described, but the present invention can also be applied to a micromachining machine using a laser.

〔Effect of the invention〕

As explained above, according to the present invention, since the visible light transmitting section and the CO2 laser beam transmitting section are provided in a single condensing optical system, a condensing optical system dedicated to nI visual light and CO2 laser beam is provided. There is no need to provide an adapter or to attach or detach an adapter, the device can be made smaller, it does not get in the way during surgery, and it has the effect of improving operability.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic longitudinal sectional front view of the laser irradiation device, FIG. 2 is a vertical sectional side view thereof, and FIG. 4 is a plan view of the condensing lens, FIG. 5 is a sectional view taken along the line ■-V in FIG. 4, and FIGS. 6 (A) to (C) show a method of manufacturing the condensing lens. It is an explanatory diagram. 4... Observation optical system, 8... CO2 laser guide (C
o2 laser optical system), 9... Condensing lens (condensing optical system), 10... Irradiation section, 11... Lens body (visible light transmission section), 12... CO2 laser light transmission section . Applicant's representative Patent attorney Atsushi Tsuboi Figure 1 Figure 2 Cause 3 Figure fs4 Figure 5 (a) Figure 6

Claims (1)

[Claims] A laser irradiation device comprising an observation optical system and a CO_2 laser optical system and configured so that the CO_2 laser beam can be focused on the irradiated part by a condensing optical system while observing the irradiated part by the observation optical system, A laser irradiation device characterized in that a visible light transmitting section and a CO_2 laser light transmitting section are provided in a single condensing optical system.