JPS62178911A - Optical fiber cable - Google Patents

Abstract

PURPOSE:To obtain a stable low power output by providing a shielding means which can be opened and closed freely, between an optical means and an optical fiber. CONSTITUTION:At the time of a high power output, a shielding plate 7 is opened manually or automatically, CO2 laser light which is made to transmit through is all projected to an optical fiber 16, and at the time of a low power output, for instance, 5W is outputted and the shielding plate 7 is throttled manually or automatically, and the transmitting CO2 laser light is cut off partially and controlled. That is, by cutting off the CO2 laser light by the shielding plate 7, it becomes a power output which has been decreased from an output of a laser projecting device, and accordingly, minute power setting of a low power, for instance, 0.1W-2W can be executed. Also, when a motion of the shielding plate 7 is executed automatically by a motor, it is interlocked with an output setting volume of a body side, and at the time of an output of >=5W, the shielding plate is not damaged due to a high power by constituting the shielding plate 7 so that it does not operate.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical fiber cable that can be used with a laser irradiation device such as a laser scalpel.

2. Description of the Related Art Infrared laser beams such as Co2 lasers are suitable for ablation and incision of living tissue, and laser irradiation devices using this have been put into practical use. Conventionally, an appropriate optical fiber that transmits a wavelength of 300 nm has not been developed, and the C02 laser beam has been guided to the surgical site by a mirror-articulated light guide path made up of a plurality of mirrors. In addition, CO2 laser light is
It has a wavelength of 10.6μ and is invisible to the naked eye, so visible light (
For example, a He, No laser) was configured to be transmitted coaxially as a guide light to clearly indicate the irradiation position.

However, the mirror-articulated light guide path has the problem of poor operability, and optical fiber cables that guide the CO2 laser light have come into practical use, for example, using optical fibers made of halides such as KH2-5. . The optical fiber cable that incorporates the optical fiber and the guide optical fiber is easy to operate and has a small diameter.
It can also be used for surgery inside small pores.

Normally, transpiration and incision require power in the range of low to high output (for example, 5W to 30W), and the surgeon orders the assistant to output the power according to the purpose, and the assistant operates the laser irradiation device. can be obtained by manipulating the

However, laser irradiation devices capable of high output have a phenomenon that the output of low power is not stable, and the lowest power is usually 1W or 3W.
In the field where surgery is performed only with a low power output of 1W to 2W, stable low power is desired.

Problems to be Solved by the Invention Currently, there are laser irradiation devices on the market that use mirror-articulated light guide paths, and purchasing additional laser irradiation devices that use easy-to-operate optical fiber cables is expensive and expensive. This is not easy to implement due to problems such as securing an installation location. Therefore, there is a method of connecting an optical fiber cable using a connector to a laser irradiation device that uses a mirror-articulated light guide path, but high-output laser irradiation devices are unstable at low outputs, and Stable low power output cannot be obtained. In addition, even if you purchase and use a laser irradiation device exclusively for low power to obtain stable low power output, when high power output is required, the laser irradiation device must be replaced, making it difficult to perform surgery that requires quick processing. It's very annoying.

Means for Solving the Problems The present invention provides an optical fiber that guides laser light, a guide light fiber that clearly indicates the laser light emitted from the optical fiber, and an optical fiber that is provided on the incident side of the optical fiber and the guide light fiber. A splitting means is provided for splitting the laser beam and a guide light incident coaxially with the laser beam and guiding it to the optical fiber and the entrance port of the guide light fiber, and a splitting means for concentrating the split laser beam. The optical fiber cable includes an optical means for inputting the light into the optical fiber, and a shielding means that can be opened and closed between the optical means and the optical fiber.

In a configuration in which the Co2 laser light and the guide light are each distributed by the action distribution mirror and the condensing lens and are irradiated to each fiber, a diaphragm shutter-like shielding that can be opened and closed is provided between the Co2 laser light and the optical fiber. A plate is provided, and the Co2 laser light incident on the optical fiber is controlled by opening and closing the shielding plate.

Embodiment An embodiment of the present invention will be explained based on the drawings. FIG. 4 shows a laser irradiation device 21 to which an optical fiber cable 22 is connected. This will be explained based on FIGS. 1 to 3. Reference numeral 1 denotes a distribution mirror, which is fixed to a holder 2 with a screw ring 1a at a certain inclination on the same axis of the incident laser beam, and is housed in a connector 3. The holder 2 has a hole 2a through which the visible light guide laser beam (for example, He-No laser) distributed by the distribution mirror 1 passes through, and an adjustment shaft 4 for adjusting the inclination of the distribution mirror 1. are held together with screws.

The holder 2 is slid within the connector 3 using the adjustment shaft 4 to adjust the inclination.

Reference numeral 5 denotes a condensing lens that condenses the CO2 laser beam distributed by the distribution mirror 1, and is fixedly held on a lens holder 6. The condensing lens 5 is adjusted in its forward and backward position by an adjustment screw 6a and tightening of the adjustment screw 6a onto the conical slope of the lens holder 6.

7 is a shutter-like shielding plate, and a knob 7a
Open/close manually or automatically.

Reference numeral 8 designates a mirror for guide light, whose multiple angles are adjusted by a knob 8a, and the reflected guide light passes through a prism 9, and then passes through a condenser lens 10 for guide light fixed to a post 15.
Therefore, the light is incident on the guide light fiber 11 within the optical fiber cable 22.

The prism 9 and the guide light mirror 8 are positioned and fixed by a prism fixture 12. The prism 9 protrudes into the connector 3 and is fixed with an adhesive or the like, and the guide light mirror 8 is positioned and fixed by a prism fixture 12. Light mirror 8 is knob 8
A is made to protrude to the outside and fixed. The prism fixture 12 is fixed to the connector 3 with a screw 13,
It is covered with a cover 14.

The boss 15 has a receiving part 15a for connecting the optical fiber cable 22, a connecting screw part 15b, a guide light hole 15c, and a CO2 laser light transmission hole 15d, and has a screw or the like (not shown) in the connector 3. ) is fixed.

Reference numeral 16 denotes an optical fiber that transmits Co2 laser light, and is housed and held in the optical fiber cable together with the guide light fiber 11.

Reference numeral 17 denotes a connection fixture having a fixing piece 17& and a laser beam transmission hole 17b, which is connected to the connector 3 by means of a screw 18.
is fixed on the laser beam incident side of the

The connector 3 is attached to the fixing piece 17 of the connection fixture 17.
By inserting the fixing piece 17a into the laser irradiation part of the laser irradiation device and rotating it by a certain angle, the fixing piece 17a engages and is attached to the laser irradiation device.

Next, the operation will be explained. When outputting high power, the shielding plate 7 is opened manually or automatically to irradiate all the transmitted CO2 laser light onto the optical fiber 16, and when outputting low power, for example, 5W is output and the shielding plate 7 is opened manually or automatically. This is to control the CO2 laser beam by blocking a portion of the transmitted CO2 laser light. That is, by blocking the C02 laser beam with the shielding element 7,
This is a power output that is lower than the output of the laser irradiation device, and thereby, a small power setting of low power (for example, o, 1W to 2W) is performed. At this time, if the shielding plate 7 is automatically operated by a motor (not shown) or the like, it is linked with the output setting volume on the main body 21 side, and the
If the shielding plate 7 is configured so that it does not operate when the output is greater than W, the shielding plate will not be damaged by the high power.

Effects of the invention By reducing the power output in a stable state and reducing the power output of the optical fiber cable, fluctuations in the power output caused by the instability of the optical output of the conventional high power equipment itself can be avoided. It is possible to obtain stable low power output.

Because it has a stable low power output, it can also be used with minute power settings, allowing the user to obtain the power they desire.

By using the optical fiber cable 22 having a connector 3 with a built-in shielding plate 7 of the present invention, it can be easily connected to a laser irradiation device for a mirror-articulated light guide, and it can be easily connected to a laser irradiation device for a mirror-articulated light guide. It can be used in a wide range of applications using optical fibers, such as surgeries that require Of course, it can also be used with high-power optical fiber type equipment that uses optical fibers from the beginning.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 3 is a cross-sectional view of A, a side view taken in the direction of arrow B, and FIG. 4 is an external view showing a laser irradiation device and an optical fiber cable. 1... Distribution mirror, 5... Condensing lens, 7... Shielding plate, 9... Prism, 2
2...Optical fiber cable. Figure 3! 4 Figure 4

Claims (1)

[Claims] an optical fiber that guides the laser beam; a guide light fiber that specifies the position of the laser beam emitted from the optical fiber; splitting means for splitting the incoming guide light and guiding it to the optical fiber and the entrance port of the guide light fiber; and an optical means for condensing the split laser light and making it enter the optical fiber; An optical fiber cable comprising a shielding means that can be opened and closed and is provided between the optical means and the optical fiber.