JPH04237583A - Light output generator - Google Patents

Abstract

PURPOSE:To maintain always the specified light output from a light source at the time of processing even if the light output of the light source is decreased by a change with lapse of time. CONSTITUTION:The control power source of the light source is feedback- controlled by detecting the light output from the light source by a light output detecting means 26 or the light output is controlled by the temp. control of the light source or the control power source is controlled in accordance with the data detecting the change of the light output of the light source with lapse of time and further, the detected light output is displayed by a light output display means 39 and the control power source is controlled in accordance therewith, by which the specified light output is obtd. and the specified processing quality of the work is maintained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light output generating device for performing brazing, soldering, resin peeling, adhesion and curing of resin, etc. by focusing the light from a light source.

0002

[Prior Art] Methods for processing workpieces using light from a light source include xenon lamps and mercury lamps that use arc discharge, and halogen lamps that emit light from a tungsten filament using Joule heat. There is a method using

[0003] Xenon lamps generate constant current arc discharge by applying a positive DC power output to the anode and a negative voltage to the cathode, and halogen lamps generate light by applying an approximately constant voltage output of AC or DC to the filament. was.

By the way, even if a constant current is flowing in a xenon lamp or the like, the light output decreases over time, and the variation in light output also increases, making it difficult to process the same workpiece under the same conditions until the end. It could not be processed.

FIG. 11 is a diagram showing changes in optical output over time. In FIG. 11, the horizontal axis shows time T, and the vertical axis shows optical output W. WF is the light output when the light source is new, and WG is the light output after Tn time, which is expressed in watts. In experiments, WG decreases to about 80% of WF after 700 to 1200 hours. In other words, even if the processing conditions for the workpiece are determined when the light source generates WF output, the output becomes WG after time Tn, resulting in a shortage of 20%. The cause of this is
This is because in a xenon lamp, the cathode is thin and it becomes difficult for electrons to be emitted from the cathode. On the other hand, halogen
In a lamp, when the filament becomes thinner, the amount of light emitted increases, but as the filament becomes thinner, the inside of the light source tube becomes contaminated with tungsten, and the light output decreases. In either case, the light output changes over time, and processing conditions must be changed each time.

[0006]

As is clear from the above description, the following problems exist in the conventional optical output generating device.

(1) Light output WG of a light source used for a long time
is 80% of the light output when new. Therefore, the processing conditions of the workpiece must be changed over time, and setting the processing conditions requires time and skill.

(2) Since the processing conditions of the workpiece change over time, it is not suitable for mass production.

(3) Furthermore, since thermionic emission is unstable in arc discharge, the light intensity fluctuates greatly immediately after lighting (approximately 10 minutes), and as the light source ages, the light intensity fluctuates even more, making it difficult to process with high reliability. There is a problem that it cannot be performed stably.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a light output generating device that can always keep the light output from a light source constant during processing.

[0011]

[Means for Solving the Problems] A light output generating device of the present invention includes a light source, a lighting means for the light source, a control power source for supplying power to the light source, and a reflection device for condensing light from the light source to a first focal point. In a light output generating device equipped with a mirror, a first sequence control that performs sequence control by distinguishing between a lighting period until the light source lights up or generates a stable light output and a subsequent period after the light source is turned on by the lighting means. and an electric output command means for instructing the control power source to reach a preset light source current or light source voltage within a lighting period;
The present invention is characterized in that a light output command means is provided for commanding the control power source to generate a preset light output during all or part of the period after the lighting period.

[0012] In some cases, a light source temperature control means for controlling the temperature of the light source by controlling a cooling fan or a heater is provided, and the control of the light source temperature control means is performed partially or entirely in place of the control by the power control means. The light output may be controlled by correcting the value.

The electrical output command means further includes: a light output detection means for detecting the light output from the light source; a first memory means for storing the relationship between the known light source current or light source voltage and the light output from the light source; a second memory means for storing the relationship between the light source current or the light source voltage and the light output from the light source when the light source changes over time, and a command value is corrected based on the data in the first and second memory means in accordance with the light source that changes over time. By providing a calculation means for calculating, the control by the light output command means may be omitted.

Further, the control power source is connected to a light detection means for detecting the light output from the light source, a light output display means for displaying the detected light output, an electric output command means, and an output value of the electric output command means and the light source. It consists of an error amplifier that amplifies the difference in the output value of the electrical output detection means that detects the current or voltage flowing in the optical The command value by the electrical output command means may be adjusted in accordance with the optical output displayed by the output display means.

[0015]

[Operation] According to the light output generating device of the present invention, even if the light from the light source that changes over time is used to process a workpiece, the light output can be directly detected and the control power source of the light source can be feedback-controlled. , or by controlling the light output by controlling the temperature of the light source, or by controlling the control power supply based on data that detects changes in the light output of the light source over time, and further displaying and based on the detected light output. Since the light output is made constant by controlling the control power source, the processing quality of the workpiece can be kept constant.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A light output generating device according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

First, the overall configuration of the control power source for the light source will be explained with reference to FIG. 1 is a rectifier for AC power supply. 2 is a power control means, which includes a choke coil 3, capacitors 4 and 5;
, an inverter primary coil 6, and transistors 7 and 8. B1 and B2 are the base terminals of the transistors 7 and 8, and E1 and E2 are the emitter terminals thereof.

Reference numeral 9 denotes an inverter secondary coil, the output of which is rectified by rectifiers 10 and 11.

12 is a DC reactor, and 13 is a capacitor, which removes ripples on the secondary output side. 14 is a current detector such as a shunt or a current transformer. Further, 15 is a high frequency coupling coil, 16 is a lighting means, and 17 is a lighting start switch. 18 is a light source such as a xenon lamp or a mercury lamp, and is provided with a cathode 42 to which negative polarity is applied and an anode 43 to which positive polarity is applied.

P1 indicates the output of the current detector 14, and P2 indicates the output of the lighting means 16.

Next, the overall configuration of the optical output generating device other than the control power source will be explained with reference to FIG. 19 is a cooling fan for the light source 18, and 19a is its fan motor. 20 is an elliptical reflecting mirror, and the cathode 4 of the light source 18 is placed at the focal point F0 of one of the mirrors.
2 is arranged, and the light L emitted from this light source 18 passes through a light path (light transmission path) as shown by the arrow and is focused on the other focal point F1. A workpiece 1 is placed near this focus (first focus) F1.
00 is placed or the entrance end 101 of the optical fiber 21 is placed. 60 is the exit end of the optical fiber 21, a condensing lens 22 is disposed near the exit end, and the workpiece 100 is placed at its focal point (second focal point) F2.

24 is a photodetector for detecting optical output;
P3 indicates its output. The photodetector 24 is a PN junction photodetector such as a phototransistor or a photodiode (charges excited by light are generated on both sides of the PN junction, and are passed through an external load connected to the anode and cathode). pyroelectric sensors for infrared detection (lithium tantalate crystals), photoconductive type (optical sensors whose electrical resistance changes depending on the light intensity) Cd cells, PbS cells, and photoelectron emission type cells. Phototubes, thermocouples (thermoelectromotive force generators based on the Peltier effect), and the like are used.

The photodetector 24, as shown by the solid line in FIG. The sensor may be arranged so as to detect the light emitted by the sensor, etc.). Alternatively, it may be arranged to detect light from the output end 60 of the optical fiber 21 or the condenser lens 22. Further, when a thermocouple is used, it may be placed in contact with the workpiece 100, and when an infrared radiation thermometer is used, it may be placed facing the workpiece 100 as shown by the broken line. Furthermore, the optical output may be detected by a detector having a thermocouple attached to a metal body.

Furthermore, as shown in FIG.
is mounted on the moving means 110 and moved intermittently to the vicinity of the transmission path of the light L, the first focal point F1, the second focal point F2, or between the exit end 60 of the optical fiber 21 and the condensing lens 22, The output signal of the photodetector 24 is amplified by an amplifier 25,
It is also possible to store it in the memory means 111 and input its output X4 to the feedback terminal. After the memory value is stored in the memory means 111, the photodetector 24 moves in a direction that does not disturb the transmission path of the light L, and the memory value is continued to be stored until the photodetector 24 detects it again in the next cycle, and the next light is detected. Update memory values on discovery. In this case, the optical output measurement operation is performed when the processing instruction signal shown in FIG. 6 is not input. Further, by installing a large number of memory means 111, a large number of light outputs during processing can be stored. It is also possible to install a photodetector 24 at the work origin, move the optical fiber 21 intermittently to the vicinity of this photodetector 24, and store the optical output in the memory means 111.

In the configuration shown in FIG. 2, the power control means 2 is constituted by a half-bridge type inverter circuit, and periodically determines the conduction time and non-conduction time of the transistors 7 and 8 to control the output. That is, the rectifier 1 rectifies the alternating current, the choke coil 3 and capacitors 4 and 5 remove ripples, the transistors 7 and 8 are turned on and off alternately at a fixed cycle, and the inverter primary coil 6 is connected to the inverter 2 coil. Power is transmitted to the next coil 9. This is the rectifier 10, 1
1, ripples are removed by a DC reactor 12 and a capacitor 13, and then applied to a light source 18.

When starting the light source 18, a voltage of 3,000 to 20,000 V is applied from the high frequency coupling coil 15 as a trigger for discharging between the cathode 42 and the anode 43, and the light source 18 is turned on. If current flows between the cathode 42 and anode 43, the high voltage application from the high frequency coupling coil 15 is stopped. That is, by driving the transistors 7 and 8 and turning on the lighting start switch 17, the lighting means 16 generates a high voltage and outputs it to the high frequency coupling coil 15, so that the power source 18 lights up, and after lighting, the lighting means 16 stops. This switching is performed by the first sequence control means 30 in FIG. 1, which will be described later.

Although FIG. 2 shows a circuit for arc discharge, the high frequency coupling coil 15 and the lighting means 16 are unnecessary for a light source using a filament such as a halogen lamp, and the light source is used instead of the current detector 14. A voltage detector is installed at both ends of 18. In other words, arc discharge lamps are controlled using current as a feedback source, and filament lamps are controlled using voltage as a feedback source.
It is appropriate to perform constant current control for the former and constant voltage control for the latter. Note that it does not have to be strictly constant current or constant voltage.

The signal detected by the current detector 14 or the voltage detector is amplified by an amplifier 29 and transmitted to the next stage as shown in FIG. The current detector 14 and the amplifier 29 constitute an electrical output detection means 40. Furthermore, the signal detected by the photodetector 24 is also amplified by the amplifier 25 and transmitted to the next stage as shown in FIG. The photodetector 24 and amplifier 25 constitute a light output detection means 26.

Although FIG. 2 shows an example of an inverter type control power source, a thyristor control type, a leakage transformer type (constant current type), a constant voltage transformer type, or a chipper type control type can also be adopted.

Next, the control circuit of the control power supply shown in FIG. 2 will be explained with reference to FIG. Reference numeral 31 denotes an electrical output command means, which commands a pre-specified current and voltage to be output, and is configured to apply a voltage to both ends of the volume and output a center voltage, and can be of an analog type or a digital type. Either of these is fine. Further, 23 is an electrical output display means for displaying the detected value by the electrical output detection means 40.

Reference numeral 32 denotes a first error amplifier, which is constructed around an operational amplifier 33.

The + mark in the operational amplifier 33 is non-inverted, -
The mark indicates the inverted input end. Also, R1, R2, R3, R4,
R5 is a resistor, 55 is a positive power supply, E is ground, X1 is an input from the electrical output detection means 40, and X2 is an input from the electrical output command means 31, where X1 is a positive polarity and X2 is a negative polarity. X3 is the output terminal of the operational amplifier 33.

[0033] The voltage values of X1, X2, and X3 are VX1 and VX.
2. If VX3 is set, A=R5/R3, and B=R5/R2, then VX3=-A*VX2-B*VX1 (* indicates the product), and as the electrical output (current, voltage) VX1 increases, For example, VX3 decreases. If command voltage VX2 increases, VX
2 increases in the negative direction, VX3 increases.

Therefore, the error of X1 and X2 is
3 and output to X3.

[0035] S1 and S2 are changeover switches, and are interlocked so that when S1 is on, S2 is off, or vice versa. X7 is the output from the changeover switches S1 and S2. Further, 34 is a reference device, 35 is a comparator,
These constitute an output width control means 36. X8 is the output of the reference device 34, and X9 (X10) is the output of the output width control means 36. 37 is a driver, B1,
E1, B2, E2 are control inputs to transistors 7, 8 in FIG.

In FIG. 4, reference numerals 45 and 46 are control signal diagrams explaining the operation of the output width control means 36, in which the output X3 of the first error amplifier 32 or the output X6 of the second error amplifier 28
Outputs X9 and X10 having widths corresponding to input X7 are output. That is, X8 is a triangular wave signal with a constant period outputted from the reference device 34, and X7 is the output of the first or second error amplifier 32, 28, which shows a case where the signal decreases as time progresses. It is shown in FIG. X
If 7>X8, signals X9 and X10 are generated in the signal diagram 46. When X7 decreases with time, X9 signal width>X10 signal width. In other words, in this case, as VX1 increases, the output width of the output width control means 36 decreases so as to gradually approach VX2. Thereafter, the driver 37 alternately converts the X9 signal into B1 and E1 signals, and the X10 signal into B2 and E2, thereby driving the transistors 7 and 8.

Returning to FIG. 1, reference numeral 27 denotes optical output command means, which has the same structure as the electric output command means 31. Also,
Reference numeral 39 denotes a light output display means for displaying the light output detected by the light output detection means 26. A second error amplifier 28 has the same configuration as the first error amplifier 32, and may be used in common. X4 is an input from the optical output detection means 26, X5 is an input from the optical output command means 27, and X6 is the output of the second error amplifier 28, which is input as X7 to the output width control means 36 via the changeover switch S2. .

Reference numeral 30 denotes a first sequence control means, which performs switching control of the changeover switches S1 and S2. 41 is a second sequence control means, and when the processing instruction switch 44 is turned on, the electric output command means 31 or the optical output command means 2 is activated.
By changing the command voltage in step 7, the light output can be changed to a level that allows processing of the workpiece. Reference numeral 38 denotes upper limit value setting means, which outputs a signal to stop the output of the comparator 35 if the output of the electrical output detection means 40 is greater than the set value.

Next, the relationship between various signals, light source current, and light output will be explained with reference to FIG. (a) is a lighting signal, which is a signal between T0 and T7 within the lighting means 16 when the lighting starting switch 17 is turned on. (b) is a machining instruction signal, T3 when the machining instruction switch 44 is turned on.
- T4 and between T5 and T6. In addition, T0~
A section in which the processing instruction signal is at a low level, other than the processing instruction section with the processing instruction signal between T7, is called a preparation lighting section. (c) is the current flowing through the light source 18, that is, the output of the electrical output detection means 40. (d) is a current section signal indicating a section in which current flows at a predetermined level or higher. (e) is the optical output.

In FIG. 6, the horizontal axis indicates time, T0,
T1 to T7 and T8 indicate arbitrary times. IA, IB, IC
is current, and WA, WB, WC, WD, and WE are optical outputs. In Fig. 6, an example is shown in which constant light control is performed only when there is a processing instruction signal (b), and WB, WD
The light output of the light source 18 remains constant regardless of changes in the light source 18 over time. On the other hand, as shown in (e), the optical output between T0 and T2 is unstable. Also, IB, IC are WB, WD, I
A corresponds to WA, WC, and WE, IA is an idling or standby period, and the optical output is not constant.

Next, various control operations will be explained.

(1) The first sequence control means 30:
(d) in FIG. 6 due to the output signal of the electrical output detection means 40.
A current interval signal (signal between T1 to T7) is generated, and when this current interval signal is present, selector switch S1 is turned off and switch S2 is turned on to perform feedback control of the optical output using the output signal from the optical output detection means 26. and when this signal is not present (
Between T0 and T1), the changeover switch S1 is turned on and the switch S2 is turned off to perform feedback control of the electric output based on the output signal from the electric output detection means 40.

(2) When the machining instruction switch 44 is turned on, the machining instruction signal shown in FIG. 6(b) is output from the second sequence control means 41 to the first sequence control means 30, and the machining instruction switch 44 is turned on. Only when the switch S2 is turned on and the switch S1 is turned off, feedback control of the optical output is performed.

(3) From the control circuit of FIG. 1, the second error amplifier 28, changeover switch S2, and second sequence control means 4
1. With the circuit excluding the processing instruction switch 44, the operator can control the setting of the electrical output command means 31 while looking at the optical output display means 39.

(4) As shown by the broken line in FIG. 3, a fan control means 61 is provided, and the fan control means 61 is controlled by the output X6 of the second error amplifier 28, and if the optical output falls below the command, the fan 19 If the fan 19 is stopped or decelerated, and vice versa, the fan 19 is rotated or sped up. That is, by such control, thermionic emission of the cathode 42 is controlled by controlling the temperature of the cathode 42, and the light output is controlled.

(5) As shown by the broken line in FIG.
A heater 62 is attached to the outside of the second lamp tube, and a heater control means 63 is provided, and the output X6 of the second error amplifier 28 is
The heater control means 63 is controlled by this, and the light output is controlled in the same manner as in (4). Note that the higher the cathode temperature, the greater the light output. The reason for this is that the cathode further changes from a cold cathode to a hot cathode, and electrons are more likely to be generated from the cathode.

Next, another embodiment of the present invention will be described with reference to FIGS. 7 and 8.

In FIG. 7, M1 is the first memory means;
2 is the second memory means, C1 is the first calculation means, and C2 is the second
The calculation means, M3 is the third memory means, C3 is the third calculation means, and M4 is the fourth memory means. 56 is a comparison means. The electrical output command means 31, the electrical output detection means 40, the optical output detection means 26, the first error amplifier 32, the output width control means 36, and the driver 37 are the same as in the above embodiment. Also,
A/D indicates an analog-to-digital converter, and D/A indicates a digital-to-analog converter.

In FIG. 8, the horizontal axis shows the current I, and the vertical axis shows the optical output W. a is a function of the initial characteristics of the light source 18: W=N
*(I-IP), and b represents a characteristic function b: W=J*(I-IP) when the light source 18 changes over time. N,
J is a proportionality constant of functions a and b, and IP is a current value when W is 0. W0 is the optical output on a at I0, W01 is I0
On b, an optical output of W0 is generated at I01. At this time, N=W0/(I0-IP), J=
W01/(I0-IP). W0, I0, and IP are known, and W01 is unknown.

Note that in the functions a and b, I
Although P is assumed to be the same, it is not necessarily the same, and in that case, the number of photodetections and calculations may be increased by the increased unknown number. IM is the allowable upper limit current (or voltage value), and IL is the light source emission lower limit current value.

Function a is stored in the first memory means M1;
Function b is stored in second memory means M2.

Now, suppose that the optical output is measured at I0 at an arbitrary time after the start of use of the light source 18 and is W01. Here, the function b having the unknown quantity stored in the second memory means M2 is inputted to the first calculation means C1, and the optical output W01 detected by the optical output detection means 26 is inputted to the first calculation means C1, and furthermore, the electric output is inputted to the first calculation means C1. If I0 commanded by the command means 31 is input to the first calculation means C1 and I0 and W01 are substituted into the function b, J becomes a known value and the function b becomes a known function.

Next, this known function b is calculated by the second calculation means C2.
and the output W0 when the current I0 is inputted from the first memory means M1, and the current I when the current W0 is output on the known function b.
Find 01. This I01 is I01=(W0/W01
)*(I0-IP)+IP. And K=I01
/I0 is calculated and input to the third memory means M3. This K is K=(1/I0)*((W0/W01)*(I0
−IP)+IP). This K is stored in the third memory means M3.

Assuming that the command current (voltage) of the electric output command means 31 is IX during processing, in order to obtain the actual command current to obtain the standard output with the light source 18 (known function b) that has changed over time, IX and K are input to the third calculation means C3, and IX*K is calculated.

If the light source 18 is driven with this IX*K, even the light source that has changed over time will generate the same optical output W0 as the light source when it was new.

Next, this calculation result is input to the comparing means 56 and compared with the input from the fourth memory means M4 which stores a predetermined maximum current IM.If IX*K>IM, then I
Otherwise, it outputs IX*K, and inputs it to the command input terminal of the first error amplifier 32 via the D/A converter. The output from the electrical output detection means 40 is input to the feedback terminal of the first error amplifier 32, and is controlled in the same manner as in FIG.

The above arithmetic processing may be performed by software using a microcomputer as shown by the broken line in FIG. Further, the fourth memory means M4 and the comparison means 56 may be deleted.

Next, a specific example of the configuration of the optical output detection means 26 will be explained with reference to FIG. In FIG. 9, L is light, and the light L indicated by a solid line is the light that enters the entrance end 101 of the optical fiber 21 at an angle within the aperture angle g of the fiber, and the other light 57
is indicated by a dashed line. 47 is a filter for optical attenuation, 48
is a photodetector such as a photodiode, and photodetector 48
is arranged to detect other light 57 via filter 47.

Further, 51 is a cladding material of the optical fiber 21,
52 is a core material, which has a refractive index of the cladding material 51 (for example, 1.4
2) is smaller than the refractive index of the core material 52 (eg, 1.46).

54 is incident within the aperture angle g, and the cladding material 5
The light 53 propagates while being totally reflected at 1, and the light 53 enters at an angle h larger than the aperture angle g and leaks from the core material 52.

49 is a photodetector such as a photodiode placed on the side near the entrance end 101 of the optical fiber 21 to detect leakage light; 50 is a photodetector such as a photodiode placed on the cladding material 51 to increase leakage light. This is a photodetector placed so as to face the aperture.

Next, optical output detection 2 when using a bundle fiber in which a large number of optical fibers 21 are bundled and hardened with resin.
A configuration example of No. 6 will be explained with reference to FIG. As in the case of FIG. 9, the photodetector 71 may be placed on the side near the entrance end 101, or any one optical fiber may be bent sideways near the exit end 60 and its tip facing the A photodetector 72 may be arranged, or the light emitted from the exit end 60 may be collected by a second condenser lens 22.
The photodetector 73 may be arranged so as to detect the reflected light when the workpiece 100 is processed while focusing on the focal point F2.

These photodetectors 48, 49, 50, 71,
Either arrangement 72 or 73 is selected and implemented. Note that it is preferable to use an operational amplifier with an FET (field effect transistor) input as the photodiode amplifier. In order to reduce the junction capacitance of the photodiode and achieve high-speed response, it is recommended to perform reverse bias control.

The present invention is also applicable to laser processing machines.

[0065]

[Effects of the Invention] According to the light output generating device of the present invention, the electrical output is controlled by the electrical output command means to be constant during the lighting period, and the light output is controlled by the light output command means when necessary thereafter. Since it is controlled to be constant, even if the light from the light source that changes over time is used to process the workpiece, the light output can be kept constant and high-quality processing can be performed.

Furthermore, by controlling the light source temperature instead of power control, the light output can be controlled without passing an excessive current, and the life of the light source can be extended.

Furthermore, by feedback controlling the light output at least during the processing period, it is possible to extend the life of the light output detection means.

Furthermore, by detecting and storing changes in the light output due to changes in the light source over time, and applying an electrical output calculated to obtain a predetermined light output to the light source, the control by the light output command means is performed. The optical output can be kept constant while omitting the configuration, the number of times the optical output is detected can be reduced, and the life of the optical output detection means can be extended.

Furthermore, by setting an upper limit value for the power supplied to the light source and preventing a current exceeding the upper limit from flowing, it is possible to extend the life of the light source.

Further, by displaying the optical output on the optical output display means and adjusting the electric output command means based on the optical output, processing can be performed with a constant optical output with a simple control power supply configuration.

Furthermore, by evacuating the optical output detecting means from the optical transmission line except when necessary, or by placing it facing the notch in the cladding of the optical fiber, it is possible to extend the life of the optical output while detecting the optical output reliably. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a control section of a power control means in a light output generation device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a control power source.

FIG. 3 is an overall configuration diagram.

FIG. 4 is a signal waveform diagram illustrating the operation of the output width control means.

FIG. 5 is an explanatory diagram of a modification of the optical output detection means.

FIG. 6 is a waveform diagram of various signals, light source current, and optical output.

FIG. 7 is a configuration diagram of a control section of a power control means in another embodiment of the present invention.

FIG. 8 is a graph showing the relationship between current and light output for explaining a method of setting electrical output for a light source that has changed over time.

FIG. 9 is a diagram showing an example of the arrangement and configuration of photodetectors.

FIG. 10 is a diagram showing another arrangement example of photodetectors.

FIG. 11 is a graph showing changes in light output of a light source over time.

[Explanation of symbols]

2 Power control means 16. Lighting means 18 Light source 19 Cooling fan 20 Reflector 21 Optical fiber 22 Condensing lens 23 Electrical output display means 26 Light output detection means 27 Light output command means 28 Second error amplifier 30 First sequence control means 31 Electrical output command means 32 First error amplifier 36 Output width control means 38 Upper limit value setting means 39 Light output display means 40 Electrical output detection means 41 Second sequence control means 56 Comparison means 61 Fan control means 62 Heater 63 Heater control means M1 First memory means M2 Second memory means M3 Third memory means M4 Fourth memory means C1 First calculation means C2 Second calculation means C3 Third calculation means

Claims (12)

[Claims] 1. A light output generating device comprising a light source, a lighting means for the light source, a control power source for supplying electric power to the light source, and a reflecting mirror for condensing light from the light source to a first focal point, the lighting means A first sequence control means is provided which performs sequence control by distinguishing between a lighting period until the light source turns on or generates a stable light output after the light source is turned on by a lighting operation, and a subsequent period, and the light source is set in advance within the lighting period. A light source that instructs the controlled power source to generate a preset light output during all or part of the period after the lighting period by providing an electrical output command means for commanding the controlled power source to set the current or light source voltage to the current or light source voltage. A light output generating device characterized by being provided with an output command means. 2. The control power source includes a first error amplifier that amplifies the difference between the output value of the electric output command means and the output value of the electric output detection means that detects the current or voltage flowing through the light source, and an output value of the light output command means. a second error amplifier that amplifies the difference between the value and the output value of the optical output detection means that detects the optical output of the light source; and a power whose width of conduction time and non-conduction time is set by the output of the first or second error amplifier. The light output generating device according to claim 1, further comprising a control means. 3. The optical output generating device according to claim 2, wherein the first error amplifier and the second error amplifier are constituted by a common error amplifier. 4. The light output generating device according to claim 2, further comprising a light source temperature control means for controlling the temperature of the light source by controlling a cooling fan or a heater, and partially or entirely controlled by the power control means. A light output generation device characterized in that the control value of the light source temperature control means is corrected in accordance with the output of the second error amplifier. 5. A second sequence control means for performing sequence control by distinguishing between a processing period in which a processing instruction signal for processing a workpiece is received and a light source output for processing is generated, and a preparation lighting period other than the processing period; 5. The light output generating device according to claim 1, wherein the control power source is controlled based on a command value of the light output command means during the processing period. 6. The light output generating device according to claim 5, wherein the control power source is controlled based on a command value of the electric output command means during the preparatory lighting period. 7. A light output generating device comprising a light source, a lighting means for the light source, a control power source for supplying power to the light source, and a reflecting mirror for condensing light from the light source to a first focal point, wherein the control power source includes an error amplifier that amplifies the difference between the output value of the electrical output command means and the output value of the electrical output detection means that detects the current or voltage flowing through the light source, and the width of the conduction time and non-conduction time is set by the output of the error amplifier. and a power control means,
The electrical output command means includes a light output detection means for detecting the light output from the light source, a first memory means for storing a relationship between a known light source current or light source voltage and the light output from the light source, and when the light source changes over time. a second memory means for storing the relationship between the light source current or the light source voltage and the light output from the light source; and a calculating means for correcting the command value according to the light source that has changed over time from the data in the first and second memory means. A light output generating device characterized by being provided with. 8. Upper limit storage means for storing the allowable upper limit current value or voltage value, and comparison means for comparing the output of the upper limit value storage means with the correction command value, and when the correction command value exceeds the allowable upper limit value, 8. The optical output generating device according to claim 1, wherein the permissible upper limit value is output as a command value or power supply is stopped. 9. A light output generation device comprising a light source, a lighting means for the light source, a control power source for supplying power to the light source, and a reflecting mirror for condensing light from the light source to a first focal point, wherein the control power source includes a light output detection means for detecting the light output from the light source, a light output display means for displaying the detected light output, an electric output command means, and an output value of the electric output command means and a current or voltage flowing through the light source. Optical output generation characterized by comprising: an error amplifier that amplifies the difference between the output values of the electrical detection means to be detected; and a power control means that sets the width of conduction time and non-conduction time based on the output of the error amplifier. Device. 10. A claim characterized in that a moving means for reciprocating the optical output detecting means between a position where it enters the optical transmission path and a position where it is evacuated, and a storage means for storing the detected optical output are provided. 10. The optical output generating device according to item 2, 4, 7 or 9. 11. Claims 1, 2, and 3, wherein the input end of the optical fiber is arranged near the first focal point, and the condenser lens is arranged near the output end of the optical fiber, so that the light is focused at the second focal point. ,
4, 5, 6, 7, 8, 9 or 10. 12. The optical fiber according to claim 11, wherein a notch is provided in a part of the cladding material of the optical fiber consisting of a core material and a cladding material surrounding the core material, and the optical output detection means is disposed facing the notch. light output generator.