JPS599609A - Device for condensing plural laser beams or the like - Google Patents

Abstract

PURPOSE:To use a condenser effectively for surgical operations by combining condenser lenses which correspond to plural laser beams into one condenser lens body and converging all beams to the same point. CONSTITUTION:The laser beams of, for example, CO2, Ar, and YAG are transmitted through optical fibers 1, 2, and 3 and projected from their projection ends 1a, 2a, and 3a respectively. The condenser lenses 4, 5, and 6 having incidence surfaces 4a, 5a, and 6a facing those projection ends are combined together to form one condenser lens body. This condenser lens body A converges the beams projected from the condenser lenses 4, 5, and 6 to the same focal point F. Consequently, the respective laser beams are converged to the same focal point and this device is used effectively for surgical operations, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for converging multiple laser beams or visible beams emitted from multiple optical fibers to the same point.

Conventionally, a method has been used in which multiple optical fibers are used to irradiate different types of laser beams to the same site, and the beams are adapted to the conditions of the surgical field in response to different stages of surgery, such as incision, coagulation, and hemostasis. It is being said.

However, the conventional methods have been to either have the output ends of optical fibers face one lens and focus the light on almost the same point, or to place condenser lenses on the output ends of multiple optical fibers, respectively. The idea was to adjust the position of each lens to focus light on almost the same point.

However, in the former case, it is almost impossible to condense each beam to a single point because the focal aberration of the lens is large, and in the latter case, since a lens is arranged for each fiber, There are drawbacks such as troublesome adjustment to make the emitted beams converge on the same point, and the apparatus becomes complicated, such as requiring a fiber support member for each fiber.

The present invention has been made in view of the above circumstances, and the CO2t emitted from the output ends of a plurality of optical fibers, respectively.
A plurality of condensing lenses facing a plurality of laser beams such as Ar + YAG are assembled into a single collective lens body, and each condensing lens has all the wavelengths of the laser beams incident on the lens. The object of the present invention is to provide a condensing device configured with a curvature such that the beams of the two converge to the same point.

In the present invention, it is most desirable that the output end of each optical fiber always directly face the incident surface of each condensing lens. It is preferable to fix the tip of Phi/N+-. Therefore, a suitable fiber tip holder or the like is used.

Hereinafter, the present invention will be described based on examples with reference to the drawings.

FIG. 1 is an explanatory diagram of a light condensing device according to the present invention. Optical fiber l, same 2. For the same 3, co2゜Ar or Y
Each laser beam of the AG is transmitted through and emitted from the respective output ends 1a, 2a, and 3a.

In this case, the type of beam emitted is not limited, and in addition to the case where three types of beams are transmitted by three phi iR- as in this example, only one visible laser beam is left as C0.
2 laser beams, or all phi laser beams.
The CO2 and visible laser beams may be irradiated to each of them in a mixed manner.

Incident surfaces 4 a and 5 a facing each of these output ends
.

A characteristic feature of the present invention is a collective lens body A in which condensing lenses 4, 5.6 each having a diameter of 6a are assembled together.

The collective lens body is shown in Fig. 2 (i), (ii), (
There are various structures as shown in liD. Part (1)
(ii) is a front view of a collective lens body having three condensing lenses 7, and (ii) shows a condensing lens 7 that allows the most important beam (for example, a CO2 laser beam) to enter near the apex. , and three auxiliary beam condensing lenses 7' are arranged around it. Furthermore, (iiD) shows an example in which each condenser lens 7 is fitted into a holder 8 made of light-shielding metal or ceramic and assembled.

Next, another important feature of the collective lens body according to the present invention is that, taking the collective lens body A in FIG. 1 as an example, the beams emitted from the condenser lenses 4-5t6 The point lies in the fact that they are configured to converge on the same focal point F. For this reason, each condenser lens is formed to have a curvature that matches the wavelength of the incident laser beam or visible beam.

Since the present invention is based on the above configuration, each laser beam or visible beam serving as a guide light for each laser beam incident on each condensing lens is converged to the same focal point via one collective lens body. This has the advantage that the output of each laser beam can be used most efficiently by irradiating a surgical site that requires incision and hemostatic coagulation at the same time or alternately, for example.

Further, according to the present invention, a high-output laser beam can be easily transmitted. In general, using optical fibers to transmit high-power laser beams has a limit on the electric field strength of the optical fibers, and optical fibers that transmit high power have large diameters. We have to sacrifice flexibility, and what's more, the burning power of optical fibers to transmit high power? In some cases, the fiber becomes unusable. However, according to the present invention, a high-output laser beam can be split in advance and transmitted through a plurality of optical fibers, so that fiber burnout does not occur and the beam has sufficient flexibility. Relatively small diameter fibers can be used and are much easier to handle. By passing the collective lens body according to the present invention at the output end of each optical fiber, the beams of each fiber are converged to the same focal point, making it possible to use them at high output.

As described above, the condensing device according to the present invention faces the output end of each optical fiber that transmits the same type of laser beam or different types of laser beams, and condenses the laser beams so that the laser beams are converged to the same focal point. Apply to the surgical field and also
It is extremely useful because it can be used to transmit high-output laser beams and has great effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a light condensing device according to the present invention, and FIG. 2 (1
) to 01i) are explanatory diagrams showing aspects of collective lens bodies. 1 , 2 , 3 ... optical fiber, 1 a g
2 a s3a... Output end, 4a, 5a, 6a...
Incidence surface, A... Collective lens body, 4, 5.6... Condensing lens, 8... Holder. Patent applicant Masanori Kai, patent attorney representing Mochida Pharmaceutical Co., Ltd.

Claims (1)

[Claims] CO emitted from the output ends of multiple optical fibers
2. Individual condensing lenses that receive laser beams or visible beams such as Ar or YAG are collected to form a collective lens body, and each laser beam or visible beam that passes through each condensing lens is all converged to the same focal point. A condensing device for a plurality of laser beams, etc., characterized in that it is configured to do so.