JPS5954486A - Laser irradiation device - Google Patents

Abstract

PURPOSE:To prevent the burnout of an optical fiber by providing an adjustment part which corrects the errors in laser output generated by the laser reflection and attenuation of an optical fiber waveguide, the variance, the service lift with age, etc. of the optical fiber under specified conditions. CONSTITUTION:The laser ray oscillated from a laser oscillator 1 is irradiated through an optical fiber waveguide 3 to the working position. An adjustment part 8 adjusts PF/alpha obtd. by dividing the output PF of the laser ray emitted from the waveguide 3 by the comparison alpha of the input and output allowing for the quantity of attenuation of reflection of laser light 2 to the output P0 of a laser oscillator 1 so that the output PF attains the value complying with the set value of the laser irradiation output. The influence such as the change in attenuation rate owing to the exchange of an optical fiber waveguide 4 and the deterioration with age, etc. are all adjusted by the part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser irradiation system for performing work by guiding a laser beam to a target site through an optical fiber.

Conventional structure and its problems Due to recent improvements in laser technology and the development of optical system components for peripheral transmission, mirror reflection type light guide devices (15), which have been commonly used in the past, A device has been devised in which the influence of gender is small and the output value is almost equal to 7 and L, which is less than 7-) or λ-.

However, the light guide device d1 using optical fiber...
, essentially the attenuation of the laser beam within the optical fiber O
", especially in the transmission of high-power lasers such as CO2 lasers used in 1/2-mill processing machines and laser irradiation equipment, the attenuation t1 is large, and the laser light with a large amount of energy is transmitted to the optical whoo-niber. - When the optical fiber is incident on the T- energy, it burns out]
i4 may also be used 71 times. .

In addition, due to the anti-JA1 effect of some of the laser beam at the input end or output end of the optical fiber light guide path, the 69 effect of the laser beam is also large, and the effect of the laser beam on the optical fiber guide path is large.
,),...f...The light guide path output value is different from 1,
In addition, the attenuation and reflectance differ depending on the two 77 optical fibers/C-, or as shown in Figure 1, the aging of the eyeglass and its life. ■There are many problems with ruby > fr: such as changes in attenuation.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, the present invention aims to ensure that the output output of the optical fiber light guide always has a predetermined output power, and to provide an optical fiber light guide with an excessive 1/- The purpose of this is to prevent burnout of the optical fiber at KL so that the light does not enter.

Radiation, attenuation, and other nine fu 1 Inoku no Kuranoki,
The above object is achieved by providing an adjustment section that can correct laser output errors caused by aging, etc. under certain conditions.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an embodiment of the present invention.
This is a schematic diagram of the main parts of the shooting device.

In FIG. 1, 1 is a laser oscillator that oscillates a laser light source 2. In FIG. 3 is emitted from the laser oscillator 1) and the laser ray Y, leads the line 2 at the work site"-) Y, f...
・-In the light guide path, inside is the incident 1] 11th L, t... lens 4° outgoing 1+111,! J-MS lens5. And the incident side condensing lens 4 condenses the light I'L 1 - laser beam 2
There are 6 fibers inside the oscillator 1 and an output control section that controls the power supply and oscillation of the oscillation tube 1. Y4fu...
9 is an adjustment unit 8 that instructs the output value of the output control unit 7 in consideration of the decrease i in the fiber light guide path 3, the amount of reflection, etc.
Output setting display section 10i7j that displays the value instructed to the output control section 7, outputs the laser beam 2 from the laser oscillator 1 to the optical fiber light guide path 3 (2/-)Y, when the two-eye bar power optical path 3 is the laser The reference power supply 2 stores the maximum value of the energy of the light ray 2 as a voltage, and 11 is the output side of the adjustment unit 8. In the j1 section 7: 1) a comparator that ratios the voltage value A indicated by 1 to the voltage value Bt4 possessed by the reference power source 10;
is an alarm device which issues an alarm when the electric current j1- value becomes B≦2'A after being compared by the comparator 11. Both 31- and 1- stop the operation of the output control section T.

In the above configuration, the laser beam oscillated from the laser oscillator 1 passes through the optical fiber light guide path 3 and is irradiated onto the work area.

At that time, the adjustment unit 8 adjusts the attenuation of the laser beam 2 or J! so that the output PF of the laser beam emitted from the eyebar light guide path 3 becomes the laser irradiation output setting value. Anticipating the amount of reflection/; PF/α obtained by dividing the output PF by the output comparison α
or output P of laser oscillator 1.

Adjust accordingly. Also, the influence of changes in the attenuation rate due to aging or changes in the attenuation rate when replacing the Noah bar special circuit 4 can all be adjusted by the adjustment section.

Functionally, the adjustment section 8 is capable of not only linear ratio conversion, but also non-linear calculation functions for peace of mind.C;1,
It's easy.

First, the reference power source 10 records the murder laser output error value pressure-converted value that can be input to the fiber light guide path 3. Compare the voltage value A specified for the maximum value reference ?
When ≦A, the alarm device 12 turns on +1 and 2.
At the same time as the alarm is generated, the alarm device 12 instructs the output feed control to start 1F during laser oscillation.

Next, another embodiment will be explained with reference to FIG. 3. 6. In FIG. 3, 1 is a laser beam 24 - a laser oscillator that oscillates, 3 is a four-way optical guide path, and 4 is a condenser lens on the incident side. ,
5 is the output side "r", lens, 6 &: J, ir, fiber, 7 is the output control section, 8 is the adjustment section, 9 is the output setting display section, 10 is the reference power supply, 11 is the comparator, 12 is the alarm The above configuration is the same as that shown in Fig. 2. 13 is a beam that changes the direction of the laser beam 2 emitted from the laser oscillator 1. The vane of the laser beam arm 2 that is progressing when the
The voltage value C sent from the d/a/zo 15 is compared with the voltage value A instructed by the adjustment section 8 to the output control section 7. It is a comparator that

In the above configuration, the operation thereof will be explained below.

Close Zuzu Bino Tsuyatta 13, l/-The Ray 24.
The power 1-ta 14 is made to irradiate the light. In addition, this beer
Tsuyatsuta 131j optical fiber? , S) Y7 path 3 Be-1, J') Y; Closed [7 Rui 1st] C is next: (= Power monitor 14 (Size - The optical: 2's power is jl ("14, Schiff II - Electric moon value C blue / Output, Anozo 15 amplifies do.

Next, in the comparator 16, the adjustment section 8 sets the output control section Y to JW>
Ratio the power value A to += and the power value C, l/-=
Check 8 times whether the power of the laser beam 2 excavated from the excavator 1 is at the value specified by the adjustment section 8.

If the power is not the value specified by the adjustment unit 8, the control unit 7C1,
111 control of the Rayleigh oscillator 1, the laser) Y,
Adjust the output of line 2.

In addition, as shown in FIG. 3, in this embodiment, the comparison result of the comparator 16 is sent directly to the control section,
It is also possible to configure the adjustment unit 8 to change the setting value in the node controllers 1 to 7 so that the output is transmitted to the control unit T.

Since the effect of the invention is 1, the tree is clear d5,) ゛1 run 1 bar,;j
: Beam reflection in optical path, reduction), 1.1.・”,0,ノY,
ノ、・I・・th Ji: ll'+:'s cypress,
Sutra 4. (Incorrect output of Rayleigh); Provide an adjustment section for intermediary adjustment (to prevent burnout of the light horn, It is a combination of "C" and "C" to prevent accidents and perform safe work.

[Brief explanation of drawings]

Figure 1 Q; j-9) Shows the attenuation rate of the laser round line due to aging of the eye bar. 3Nd,
3, which is a diagram of a l/-4, J irradiation equipment in another embodiment of the present invention;

Claims (1)

[Claims] A laser beam oscillator that excavates a laser beam, and
2. A fiber light guide path, a control section for controlling the oscillation output of the laser beam oscillator, and a control section for controlling the oscillation output of the laser beam oscillator, and the optical fiber light guide path. Let the output emitted from PF be 7.1
70 ii [Sh) Y, Fourver light guide path router line input/output ratio ao・α, laser output of the laser oscillator)
and an adjustment section that instructs the 11il control section so that J becomes PF, /u. (1
shooting device.